Polishing or grinding machine.



W. V. ROBINSON.

POLISHING 0R GRINDING MACHINE.

APPLICATION FILED AUG.2I, 1914.

1,349,728 Patented May 18, 1915.

3 SHEETS-SHEET I.

INVE/VTUI? W z' ZfQm 1475022713071 wmvmgs;

A TTOR/VEK THE NORRIS PETERS 60.. PHOTO-Lrrnu. wlnnmululv, u. C.

W. V. ROBINSON.

POLISHING 0R GRINDING MACHINE.

APPLICATION man AUG-21. 1914.

1,139,728 Patented May18 ,1915.

3 SHEETS-SHEET 2.

WITNESSES: I //v VE/V 70R ATTOR/VEK'S THE NORRIS PETERS c0. PHOTO-LITHD... WASHINGTON. D4 C.

W. V. ROBINSON.

POLISHING (IR GRINDING MACHINE.

APPLICATION FILED AUG.2I, 1914.

15139328. Patented May 18, 1915.

3 SHEETS-SHEET 3- wmvsssfs: INVENTOR W/H/am 1 Fob/n30 ATTORNEY THE NORRIS PETERS CO.. PHOTU-LITHQ. WASHINGTON. D. C.

' I POLISHING OE GRINDINGMACHINE.

To all whom it may concern:

Be it known that I, WILLIAM V. Romuson; a citizen of the United States of America, residing at Lansing, in the county of Ingham and State of Michigan, have invented certain newand useful Improvements in Polishing or Grinding Machines, .of which the following is a specification, reference being had therein to the accompanying drawings.

My invention relates to polishing or grinding machines and more particularly to a machine for polishing or grinding rods, shafts or the like. r a

The invention resides in the provision of means for efficiently and automatically feeding the work to the grinder; in the structure by which the work may .befed longitudinally across the grinderand properly rotated during its longitudinal travel; in the means for automatically effecting a relative movement between the grinder and the work to disengage the work and grinder at opposite limits of travel of thework; in a con-" struction by which shafts, rods or the like of various lengths may be polished or ground; and further the invention resides in certain arrangements, constructions and combinations'of parts as will more fully herein-r after appear.

In the drawings,-Figure 1' is a side ele-' ing how travel of thecarriage is actuated by an endless chain; Fig. 6 is a cross section view of the carriage; Fig. 7 is a plan view showingportions of the mechanisms for driving the carriage and for rotating the work; Figs. 8 to 10 inclusive are detail views of the mounting of a sprocket wheel, whereby the same is adapted for adjustment toward another sprocket wheel.

A designates the main frame of the machine and B an auxiliary frame extending laterally of the main frame and having spaced rails C and D forming a track for a carriage E. The latter is. provided witha downwardly-extending arm F vertically slotted'at G to receive a pin or roller H that Specification of Letters Patent.

Application filed August 21, 1914. Serial No. 857,863.

Patented May 18, 1915 projects laterally from a chain 1. This chain passes over spaced sprockets J and K arranged within the frame B, one of these sprockets as K being driven from a shaft L through the medium of bevel gears M- and N respectively fixed to the shaft L and the shaft 0 of the sprocket J.

Positioned above the auxiliary frame B is a grinder or polishing member P that is carried by a suitable frame Q, and is driven from a shaft R by means of pulleys S and T and a' beltU. driven by any suitable source of power but The shafts L and R- may be rs a r arr rib.

are preferably actuated by the following w drive trains. pulley which isconnected by a belt W to a pulleyY on the shaft R. Z is a small pulley on the shaft R which drives a pulley Aon a shaft B. The latter-through the medium, of pulleys G and D and the belt D drives a shaft F. G is a drive train be-. tween the shaft F and the shaft L.

The carriage E is provided. with spaced bearings H H within which are arranged for rotation work-engaging members. I 1 The shaft K or other member to be ground is engaged withthe members I I androtated thereby. To the member 1 'is' -secured a sprocket L that meshes with a gear M splined to a shaft N. The latter member has its ends journaled in bearings O P adjacent opposite ends of the frame B, and this shaft is driven by means of the belt Q and pulleys R S from the shaftL.

In operation of the structure so far described, the shaft K or vother work; to be ground is engaged with the members I and I? and the grinder or polishing member P Thus V is the main driving adjusted to properly engage the work. a

Upon power being transmitted to the pulley P the grinder orpolishing member is rotated through the medium of the drive trains 'hereinbefore pointed out, and also motion is i I the desired'polishing or grinding is effected.

By rotating the work as it is fed beneath the grinder or polisher a very uniform grinding or'polishing is accomplished.

It is very desirable to provide a machine that will be readily adapted to work of various lengths. In the drawings I have illustrated one embodiment of the inven-- tion whereby the grinder or polisher may be readily adjusted to take any length of rod, shaft or the like, within the limits of the machine and yetto produce a uniform grinding or polishing of the work throughoutits entire length. As shown, the carriage E is provided adjacent opposite ends with trucks at b, the wheels 0 of which travel upon the rails C and D. The latter have cut-away portions d, and when the wheels 0 pass intoengagement with these cut-away portions, the work is lowered out of engagementwith the grinder or polishing member,

since the'truc'ks carry the bearings within which the work is mounted. The parts are so proportioned that the work will be low- 'ered out of'engagement with the grinder or polishing member when the latter has reached the end of the work and before it would engage the bearing H" or I-I.- To

' permit'shafts, rods or thelikeof'va'rious lengths to be properly mounted in relation tothe work, the trucks or b are adjustable toward and from each other. Thus 6 are side members:preferably formed of angle- 7 shapediron and which serve to connect the so as 'to be adjusted longitudinally thereof as trucks, Oneof the trucks or both themem, bers a 7) arejconnected to the angle irone by providing the truck with a clamp f which when loosened, will allow the "truck to be moved longitudinally of themember 6 but when tightened, will clampthe truck I shaft or the like, within the capacity of the to said members 7 With the construction of carriage just described, the travel of the carriage is that 're quired for the maximum length of rod,

machine. When a shorter length piece of work is to be ground or polished, when the ends 1 of the work are reached, the wheels ofthe trucks will ride into engagement with thecut-away portions and willcontinue in engagement with the cut-away portions un-' til the carriage is reversed, the cut-away 7 portions of the rails being of sufficient length.

to permit of this operation.

While various devices for holding the.

I: work might be employed, I have illustrated 'in the drawings a simple and novel work holder. to allow the work to be readily engaged and disengaged therefrom. Thus, the member I not onlyis rotatably mounted in the bearing H, but alsc is longitudinally adjustable therein As shown, the bearing H is formed of spaced lmembers H Hf, and the gear L is arranged intermediate the memnent of this member;

bers I-I H and is splined to the'member I At the outer end of the member I is ahead A against which bears a stop A composed truck a.

0f an arm pivoted at its lower end to a x In the structures shown in Figs. 4 and 5; I

the inner ends of the members I I are tapered and squared in cross section so as to engage a hollow shaft or tubing. When a solid shaft or other members are to'be 0perated upon, the inner end of the members I I may be suitably shaped to properly engagethe work and couple the same thereto.

, Preferably the sprocket J is mounted so as to be adjusted longitudinallv of the mem-' ber B to allowthe chain to be shortened if so desired, whenshort pieces of work are being groundi Thus as shown in Figs. 7 to Y 10 inclusive, the sprocket J is mounted upon a stub'shaft that is carried by amember A The latter has a portion 13 engaging a bracket C attached to the member B as by vided with a portion E spaced from the member B forming a guide therebetween.

F is a projectionupon the portion E adaptedto engage a'groove G in the portion B Carried by the part B are clamping screws H and K are washersadapted to extend over the upper edge of the portion sire to limit my protection to the particular structure'illustrated,fbut consider the inven tion to be of sufficient scope to embody various modifications. 1; V

What I'clai'm' asmy invention is z* 1. The combination with a grinder or polishing member, of means for feeding work longitudinally of said member, means for rotating said work during'the longitudinal feeding thereof, and meansfor shifting the work clear of said member at a pre determined point in the longitudinal wmovement of the work; 2. The combination with a grinder or polishing member, of means for feeding work longitudinally of said member, meansfor rotating said work duringthe longitudinal :E Thus by releasing the screwsH' the member B maybe adjusted longitudinally 10,0 7 means'of bolts D The member C is pro feeding thereof, and means forshi'fting the work clear of said memberwhen the end of the work isfreached. r

3. Thev combination with a grinder'or polishing member, of a work-holder, means for reciprocating said work-holder longitudinally of said member, means for rotating said work during the longitudinal feeding thereof, and means for disengaging the ber, and means for lowering said carriage at a predetermined point in the travel of said carriage to disengage the work from said member.

6. The combination with a grinder or polishing member, of a work-holding carriage, a track upon which said carriage runs, means for reciprocating said carriage longitudinally of said member, said track being provided with a cut-away portion for the purpose described.

7 The combination with a grinder or polishing member, of a work holding carriage, a" track upon which said carriage runs, means for reciprocating said carriage upon said track, the latter being provided with cut-away portions arranged to lower the carriage at opposite ends of its travel so as to disengage the work from said member when said member is in immediate proximity to the ends of the work.

8. The combination with a grinder or polishing member, of a work-holding carriage provided with trucks adjacent opposite ends thereof, a track upon which said trucks travel, provided with a cut-away portion for the purpose described.

9. The combination with a grinder or pol-' isliing member, of a work-holding carriage comprising spaced bearings within which the work is mounted for rotation, spaced trucks upon which said bearings are mounted, a track upon which said trucks travel, means for reciprocating said carriage upon said track, and means for rotating said work during the reciprocation of said carriage.

10. The combination with a grinder or polishing member, of a work-holding carriage comprising spaced bearings within which the work is mounted for rotation, spaced trucks upon which said bearings are mounted, a track upon which said trucks travel, means for reciprocating said carriage upon said track, a driven shaft, a gear slidable longitudinally on said shaft but secured to rotate therewith, and a pinion on said carriage meshing with said gear andsecure to rotate with the work. .1 11. The combination with a grinder or polishing member, of a work-holder, means for reciprocating said work holder longitudinallyv of said member, means for disengaging the -work and said member at spaced points in the longitudinal reciprocation of said holder, and means for adjusting the work holder for various'l'engths of work.

12. The combination with'a grinder or polishing member, of a work-holding car-' riage reciprocating longitudinally of said member including work-engaging members, means for adjusting the distance between thefwork-holding members, and means for actuating said carriage to move the work carried thereby outof engagement with said member at a predetermined pointin' the travel of said carriage in the different positions of adjustment of said work-holding members.

13. The combination with a grinder or polishing member, of a work-holding carriage. reciprocating longitudinally of said member, means for adjusting the length of the carriage, and means for actuating said carriage to move the work carried thereby out of engagementwith said member at a predetermined point inthe travel of said carriage. 14. The combination with a grinder or polishing member, of a work-holdingcar riage reciprocating longitudinally of said member, means for lowering said carriage at a predetermined point in the travel of the same to disengage the work from said member, and means for adjusting the length of said carriage.

15. The combination with, a grinder or polishing member, of a work-holding carriage reciprocating longitudinally of said member, including spaced trucks, workholding means carried by said trucks, and means for adjusting the distance between said trucks.

16. The combination with a grinder or v polishing member, of a work-holding carriage reciprocating longitudinally of said member, including spaced trucks, workholding means carried by said trucks, and means for varying the distance between said work-holding means.

17. The combination with a grinder or polishing member, of a work-holding carriage reciprocating longitudinally of said member, including spaced trucks, work-holding members respectively carried by said trucks, means for connecting said trucks together, and means for effecting a relative adjustment between said trucks, for the purpose described.

18. The combination with a grinder or polishing member, of a work-holding carare journaled, means for rotating. one of said riage reciprocating longitudinally. of said member, including spaced work-engaging members, bearings in which said members are j ournaled, means for rotating one of said member, including spaced work-engaging members, bearings 1n whleh said members members, and means for yieldably moving one of said members toward the otheizi w 20. The combination with a grinder or polishing member, of means for feeding Work longitudinally of said member, means for rotating'the work during the longitudi- I nal feeding thereof, and means automati r iage reciprocating longitudinally of said member, means for rotating the work durmg reciprocation of the carr1age,"and means vfor automatically shifting one end of the carriage out of its path of travel ata predetermined point therein, to disengage the WOI'k from said member;

In testimony whereof I afliiz my signature in presence of two witnesses.

Witnesses: 7

WM. J. BELKNAP, HENRI E. BOWMAN.

\ Copies of this patent may be obtained forfive cents each, by addressing" the Commissioner of ratents,

; 1 1 Washington, D. C.

W LIAM .V. ROBINSON. 1 p i 

